Summary: to a different size type of line A paper towel dampened with rubbing alcohol will completely remove any remaining ink in a few swipes so you can rewrite new line specifications on the spool As shown above spare reel spools fit swell inside a large 3700 series Plano box The photo here shows the reel spools exposed but that s not a good idea in practice Ideally you want to
Image Dimensions: 500 x 325
Image originally found here.